Concrete mixer



CONCRETE MIXER Original Filed Aug; 29,- l90 g wventoz l. Pit Spa wen.

Patented June 14, 1932 iimrsn srarss rArsNr caries VAINO PIISPANEN, OFHELSINKI, FINLAND, ASSIGNOB TO KOEHRING COMPANY, OF MILWAUKEE,WISCONSIN, A CORPORATION OF WISCONSIN CONCRETE MIXER Application filedAugust 29, 1930, Serial No. 478,701.

i since it is of a small type construction, and

will have a number of advantages due to its simplification of operationand fewness of mechanical parts.

Essentially the invention comprises a mixer in whichlemploy a verticalsupporting standard deflected at an angle at its upper portion so thatthe concrete mixing drum supported by such portion may in one positionincline upwardly so as to have a non-discharging adl justment, but mayin another position, after proper rotation, assume a downwardly inclinedadjustment such that it may be readily emptied or discharged. Theoperating means which I employ has a dual function in acting upon thedrum. In the first place it is adapted to rotate the drum forits mixingoperation and in the second place it is adapted to swing the drum aroundits general axis established by the mounting thereof by the standardaforesaid so as to bring the drum from a nondisoharging position to adischarging position, and vice versa.

With the foregoing general objects in View, my invention is depicted inthe accompanying drawing, by two figures, as follows ' Figure 1 is avertical sectional View illustrating the mixing machine as when it isbeing operated for mixing, and

Figure 2 is a similar View showing the drum turned to the position itassumes when discharging.

A machine made in accordance with my invention comprises a base A whichmay be a fiat base or made of three diverging foot Renewed April 19,1932.

members, this being immaterial. From the base projects upwardly thestandard B which comprises a vertical lower portion and an upper portionB extending at an angle to the axis of said lower portion. The standardB may be a bent structure or a composite structure. At the top of theangularlydisposed portion B of the standard is the supporting head 1which carries the mixing drum and drive mechanism therefor. Thesupporting head includes a socket portion la that receives the upper endof the angular portion B on the standard B so that the head 1 has aswivelling movement or is revolvable about the part B under suitablecontrol. Transversely of the head 1 at its upper portion is disposed thedischarging shaft 2 operable by a handle 3 or any suitable motor meansthat might be mounted on the standard B if such means is desired to beused. However, as the mixer is intended to be a small type construction,it will preferably be made by manual operation by a handle like thecrank handle 3. Fixed to the shaft 2 is the driving gear 4: which mesheswith an internal driven gear 5 carried by the head or casting 6 at theclosed end of the drum 7. The drum is of the tapering tiltable typewhich is known to be used considerably today. The casting 6 whichcarries the gear 5 receives a mounting shaft 8 and has a bearing 6asurrounding said shaft 8 so that the drum 7 may freely rotate on theshaft 8 as an axis. A cap 9 may be used to close the upper end of thebearing 6a and extend over the upper end of the shaft 8 and also containa lubricant such as oil or grease.

Now since the supporting head 1 may-be revolved about the part B as anaxis which may be maintained in the adjustment of Figure 1 wherein themixing rotation of the drum 7 may be compelled to perform the mixingoperation since the shaft 8 is secured by being keyed or pinned, as at10, to the head 1, it will be apparent that by swinging or revolving thehead 1 around the upper part B of the standard B, the drum 7 may beadjusted to occupy the position of Figure 2 and then when rotated theblades thereof will discharge the aggregates of mixed concretetherefrom. Any suitable blading construction may be employed in thedrum.

It will be observed that the handle 8 and the shaft 2 constitute adriving means for rotating the drum 7 and they also constitute a meanswhereby the supporting head may be turned bodily or revolvable on thestandard part B to shift the drum from the position of Figure 1 to theposition illustrated in Figure 2, and vice versa. It will be apparentthat my mixing machine comprises practically nine parts of greatlysimplified arrangement and construction. Also it will be apparent thatthe machine may be practically adjusted so that its mixing drum mixes inany position that may be reached in its revolving movement anddischarges in any position that may be reached in its revolvingmovement.

Having thus described my invention, what I claim as new and desire tosecure by Let t ers Patent of the United States, is-

1. In a concrete mixin machine, in con1- bination, a base, a standardcarried by said base and arranged at an angle'to the vertical, asupporting head mounted on said standard and adapted to revolve aboutthe standard as an axis, and a rotatable mixing drum carried by saidhead and adjustable by reason of movement with the head to assumedischarging and non-discharging positions.

2. In a concrete mixing machine, in combination, a base, a standardcarried by said base and arranged at an angle to the vertical, asupporting head mounted on said standard and adapted to revolve aboutthe standard as an axis, and a rotatable mixing drum can ried by saidhead and supported by reason of the angular disposition of the standardand head thereon in an upwardly inclined position when mixing, and in adownwardly inclined position when discharging, together withinstrumentalities for causing rotation of the drum.

3. In a concrete mixing machine, in combination, a base, a standardcarried by said base and arranged at an angle to the vertical, asupporting head mounted on said stand ard and adapted to revolve aboutthe standard as an axis, and a rotatable mixing drum carried by saidhead and supported by reason of the angular disposition of the standardand head thereon in an upwardly inclined position when mixing, and in adownwardly inclined position when discharging, together with meanscommon to the head and to the drum for revolving the head upon thestandard and for rotating the drum relatively to the head.

4. In a concrete mixing machine, in com-

